Heman gardiner



H. GARDINE-R.

Car. Spring Patehted June 1, 1858.

N PETERS PHDTO-LITHOGRAPHER, WASHINGTON. D. C

UNITED STATES PATENT OFFICE.

HEMAN GARDINER, OF NEW YORK, N. Y.

SIRING FOR RAILROAD-CARS.

Specification of Letters Patent No. 20,418, dated June 1, 1858.

To all whom it may concern:

Be it known that I, HEMAN GARDINER, of the city, county, and State ofNew York, have invented certain new and useful Improvements in Springsfor Railroad-Cars and other Purposes; and I do hereby declare thefollowing to be a full description of the same, reference being had tothe accompanying drawings, forming a part of this specification, thesame letters of reference wherever they occur referring to like parts.

Figure 1, is a representation of the folds of the fillet. Fig. 2, is aplan view of a box into which the spring is cased. Fig. 3, is a sideelevation of the spring case or box, having a thumb rod which is tappedinto the cap plate of the fold for the convenience of operating thespring in the box. Fig. 4, is the plate of steel to be shaped intofolds. Figs. 5, 6, 7, are enlarged representations showing the mode ofattaching to the car truck. Fig. 8, is a representation of the mode ofconstructing the case, for holding the spring and allow of its expansionand contraction under pressure, and prevent exposure to dust, &c.

The nature of my invention consists in arranging a series ofsemi-elliptical springs of a peculiar shape and small size in the formof a square shaped column, between the leaves or folds of a folded steelplate, or

. fillet folded back and forth, so as to form also a square shapedcolumn, the springs and plate being held together by a bolt passingthrough a hole in the center, whereby the elastic force of theintermediate springs acts with a leverage corres onding with the lengthof the plate of stee of which the folds are made, and producing greatsoftness and ease in action. The fillet or plate of steel may be foldedinto any required number of folds and the plate should be of such formthat when folded it will present a square shaped column, that being inmy judgment the best form for the spring. The semielliptical springs aremade with the edges slightly curved upward when they rest upon the foldsof the plate as seen at B, B, Fig. 6, and they are made of well temperedsteel; their small size and simple shape render them perfectly easy toharden, anneal, and temper to the degree desired The whole may be placedwithin a case 01' box composed of one piece as in Fig. 6, or in twoparts as in Fig. 8.

It is not my intention to claim as my invention the forming of a springout of a fillet or plate folded back and forth; nor the use simply ofauxiliary or intermediate springs in detached pieces. I am aware of theuse of small springs as described in the specifications of Holmes andEvans, and Clark and Proctor; I am also aware of the plate described inthe specification of D. B. Rogers, and that of Hill patented in England.But

What I claim as my invention, and for which I desire Letters Patent is-The arrangement of the peculiar shaped semi-elliptical springs B, B, inthe form of a square shaped column, held in position and made to act asone spring by the folded steel plate so as to give the long leverage andeasy soft action as above described; the several springs and foldedplate being combined and held together by the bolt passing verticallythrough them as above set forth.

HEMAN GARDINER.

Witnesses:

E. A. VANDERI-IOFF, C. L. BARRI'IT.

